Sheet delivery mechanism



Oct. 9, 1934. J, R, BLAINE 1975 76 SHEET DELIVERY MECHANISM Filed April19, 1929 2 Sheets-Sheet l 6t 9, 19340 J R BLAlNE 1,975,764

SHEET DELIVERY MECHANISM Filed April 19, 1929 2 Sheets-Sheet; 2

IT'LUGTUITT \jbseph R- BZai 1el5 fingers were made of rigid pieces ofwire or strips sheet handling machine has to remove some of so so, itfrequently happens that the operators handling machine, deliverystripper fingers are 0. 'vention to eliminate such accidents and toavoid .such as fiber or Patented Oct. 9, 1934 SHEET DELIV R ECHAN SM-J-oseph R.-Blaine, Oak Park, 111., assignor to The Miehle PrintingPressand .Manufacturing Company, Chicago, Ill.,

linois a corporation of Il- Application April'lfil, 1923, Serial No.356,355

' 2 Claims. (01-. arr-:19) V I have selected to illustrate two practicalde- '5 This invention relates to improvements in stripper fingers suchas are used in sheet delivery mechanism of printing presses and othersheet handling machinery.

Stripper fingers are arranged in the path of movement of the sheets tobe delivered. Usually they are mounted in a position above the sheetreceiving means so that when the sheets are released by the deliverymechanism, the leading edge of the sheets will be deflected against thestripper fingers in order to primarily break the velocity of the sheets,and then to direct them downwardly onto the board, so that they willform an even pile on said board.

Heretofore, as is well known in the art, stripper of metal such as flatsprings of substantial thickness secured to a supporting shaft or thelike mounted above the sheet receiving means.

It occurs frequently that the operator of a the sheets deposited on thedelivery board, without, however, wishing to interrupt the operation ofthe delivery mechanism. Furthermore, it becomes necessary at times forthe operator to which were not properly placed in position by thejogging mechanism. In both instances, the operator has to pass his handsbetween the stripper fingers and the deposited sheets and in doing handis caught between said fingers and some moving parts of the deliverymechanism, resulting in injury.

Sometimes, during the operation of a sheet accidentally moved into thepath of the delivery grippers, thereby causing damage to the deliverymechanism.

It is therefore the primary object of my indamage of the nature pointedout above.

I accomplish this purpose by providing stripper fingers which are madeof resilient material any other suitable substance which will readilyyield or break and not injure the hand of an operator nor damage anypart of the sheet delivering Imechanism.

A modified form of my improved stripper fingers comprises a resilientlymounted strip of metal which will ofier adequate resistance to direct asheet of material onto the delivery board but which will yieldsufiiciently to render impossible any such accidents as hereinabove in-I dicated.

signs of stripper fingers on the accompanying drawings, in which Figure1 is a side view of a stripper finger made of fiber or of any otherresilient or fragile material;

Figure 2 is a view taken from below that shown in Figure 1;

Figure 3 is a partial fractional view of a modified form comprising aresiliently mounted stripper finger made of metal; and

Figure 4 is a view taken from below that of Figure 3;

Figure 5 is a diagrammatic view of a delivery mechanism to which myinvention may be applied.

According to the design illustrated in Figures 1 and 2 of the drawings,the resilient stripper finger 10, consisting of fiber or of any othersuitable material, preferably having a limited degree of resiliency, issecured to a bracket 11 mounted on a supporting shaft 12. To avoidlateral displacement of the finger 10, I provide a shallow recess 13within which the end of the resilient finger is secured by means of ascrew 14.

It will be readily understood that, depending on the dimension andweight of the sheets 15 to be delivered, the lateral position of thestripper fingers, and also their angle relative to the delivery tableonto which the sheets 15 are to be deposited, has to be changed.Accordingly, the bracket 11 is slidably mountedon the shaft 12 so thatit can be readily adjusted to any desired position and angle byloosening the set screw 16.

Referring to the modified form of stripper fingers illustrated inFigures 3 and 4, the bracket 11 is provided with an extension 16 towhich a metal strip or finger 17 is pivoted. In this form ofconstruction, the metal finger 1'7 is resiliently held against thepressure of a spring 18 and its operative position is determined bymeans of a stop lug 19 which cooperates with an abutment 20 provided onthe bracket 11.

In Figure 5 of the drawings the improved stripper is illustrateddiagrammatically as applied to a well-known type of delivery mechanism.The sheet 21 which has been taken from the impression cylinder 22 by thegrippers 23 of the traveling sheet conveyor 24., and which is to bedeposited onto the delivery pile 25, is shown as being advanced towardthe stripper l0. Shortly before the leading edge of the sheet 21 reachesthe stripper 10, the grippers 23 open and release the sheet. The leadingedge of the released sheet will then impinge against the stripper 10 andthe sheet will be deflected downwardly onto the pile 25.

While for the purpose of illustrating my invention I have shown twoforms of stripper fingers, it will be readily understood that othermodifications could be applied withoutdeparting from the scope of theappended claims.

traveling sheet conveyor, a receiving table, and a resilient stripperextending above said table and into the path of the sheets to bedelivered for deflecting the latter toward said table and away from saidconveyor, said stripper being adapted to yield readily for the purposeof protecting the operator against injury as hereinabove set forth.

3. In combination with mechanism of the class described for deliveringsheets of material, a traveling sheet conveyor, a receiving table, andan adjustably mounted resilient stripper finger extending above saidtable and into the path of the sheets to be delivered for deflecting thelatter toward said table as they are released by said conveyor, saidfinger being adapted to yield readily for the purpose of protecting theoperator against injury as hereinabove set forth.

JOSEPH R. BLAINE.

